findreplace.c

#include <gtk/gtk.h>
#include<string.h>

extern GtkWidget *view;
GtkWidget *text_view;
GtkWidget *search_entry,*replace_entry;

void replace (GtkTextView *text_view, const gchar *text,const gchar *text1, GtkTextIter *iter)
{
  GtkTextIter mstart, mend;
  GtkTextBuffer *buffer;
  gboolean found;
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW(text_view));
  found = gtk_text_iter_forward_search (iter, text, 0, &mstart, &mend, NULL);
  if (found)
    {
      gtk_text_buffer_select_range (buffer, &mstart, &mend);
      gtk_text_buffer_create_mark (buffer, "last_pos", &mend, FALSE);
	
	 int len=strlen(text1);
	 gtk_text_buffer_delete(buffer,&mstart,&mend);
	 gtk_text_buffer_insert(buffer,&mstart,text1,len);
    }
}
void replace_button_clicked(GtkWidget *replace_button)
{
  GtkTextBuffer *buffer;
  GtkTextIter iter;
 
  buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_view));
  gtk_text_buffer_get_start_iter(buffer, &iter);
  
  replace (GTK_TEXT_VIEW(text_view),(gchar *)gtk_entry_get_text((GtkEntry *)search_entry),(gchar *)gtk_entry_get_text((GtkEntry *)replace_entry),&iter);
}

void text_find_replace(void)
{
  GtkWidget *win;
  GtkWidget *vbox;
  GtkWidget *hbox;
  GtkWidget *search_button;
  GtkWidget *replace_button;  

  win = gtk_window_new (GTK_WINDOW_TOPLEVEL);

  vbox = gtk_vbox_new (FALSE, 2);
  gtk_container_add (GTK_CONTAINER (win), vbox);

  hbox = gtk_hbox_new (FALSE, 2);
  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
  
  text_view = view;

  search_entry = gtk_entry_new();
  replace_entry = gtk_entry_new();

  gtk_box_pack_start (GTK_BOX (hbox),search_entry, TRUE, TRUE, 0);
  gtk_box_pack_start (GTK_BOX (hbox),replace_entry, TRUE, TRUE, 0);

  search_button = gtk_button_new_with_label ("Search");
  gtk_box_pack_start (GTK_BOX (hbox), search_button, FALSE, FALSE, 0);
  g_signal_connect(G_OBJECT (search_button), "clicked",G_CALLBACK (search_button_clicked), NULL);
  
  replace_button = gtk_button_new_with_label ("Replace");
  gtk_box_pack_start (GTK_BOX (hbox), replace_button, FALSE, FALSE, 0);
  g_signal_connect (G_OBJECT (replace_button),"clicked",G_CALLBACK (replace_button_clicked), NULL);

   gtk_widget_show_all(win);
}